URL https://www.researchgate.net/profile/Peter_Karuso/publication/12717326/figure/download/fig1/AS:601701895651344@1520468319379/4-4-DDT-and-its-residues-DDD-DDE-and-2-4-DDT-which-predominate-in-soil.png
URL2 https://www.researchgate.net/figure/4-4-DDT-and-its-residues-DDD-DDE-and-2-4-DDT-which-predominate-in-soil_fig1_12717326
